Determination of mechanical behaviors of Ho3+:BaY2F8 single crystals by nanoindentation. Issue 17 (1st December 2019)

• Record Type: Journal Article
• Authors: Zhang, Wei; Song, Hai-Zhi; Zhang, Zhibin; Luo, Hui; Jiang, Yong; Xie, Xiumin; Yao, Chao; Yuan, Liu; Deng, Jie; Hu, Weiying; Chen, Qingmin; Huang, Haihua; Dai, Qian; Hao, Xin; Liu, Qibin
• Is Part Of: Ceramics international. Volume 45:Issue 17(2019)Part A
• Page Start: 21751
• Page End: 21758
• Publication Date: 2019-12-01
• Subjects: Ho3+:BaY2F8 -- Nanoindentation -- Deformation -- Hardness -- Young's modulus; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2019.07.176
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The high-quality 20 mol% Ho 3+ :BaY2 F8 single crystal has been grown by the Czochralski method. The deformation, hardness and Young's modulus of Ho 3+ :BaY2 F8 single crystals have been studied by nanoindentation measuring method. The load-depth of Ho 3+ :BaY2 F8 single crystals were measured under different maximum loads (4–150 mN). The experimental results revealed that the plastic deformation component governs Ho 3+ :BaY2 F8 single crystals at the indentation loads of 4–140 mN. The slip lines in <010> directions appeared at above 30 mN indentation load and increased with indentation load increasing. With the load exceeding 140 mN, a microcrack was detected around the indentation. It is found that materials pile-up and propagation of dislocations dominate the deformation mechanism, where no phase transition occurs. The hardness and Young's modulus are 3.16 ± 0.08 GPa and ~106.9 GPa, respectively. To our best knowledge, the nanoindentation behavior of Ho 3+ :BaY2 F8 single crystal is reported for the first time.